JP2010021514A - Organic light-emitting display device - Google Patents

Organic light-emitting display device Download PDF

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JP2010021514A
JP2010021514A JP2008328223A JP2008328223A JP2010021514A JP 2010021514 A JP2010021514 A JP 2010021514A JP 2008328223 A JP2008328223 A JP 2008328223A JP 2008328223 A JP2008328223 A JP 2008328223A JP 2010021514 A JP2010021514 A JP 2010021514A
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organic light
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JP4940226B2 (en
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Eun-Ah Kim
恩 雅 金
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Samsung Display Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/126—Shielding, e.g. light-blocking means over the TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H01L27/14678—Contact-type imagers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic light-emitting display device provided with a touch screen using photosensors capable of preventing generation of malfunction by preventing inside light interference. <P>SOLUTION: The organic light-emitting display device includes: a first substrate on which a plurality of organic light-emitting elements are formed; a second substrate coupled with the first substrate; a plurality of photosensors formed on the second substrate to detect a change in incident light generated by an external source; and a shielding layer covering the photosensors to shield light emitted from the organic light-emitting elements so as not to be detected by the photosensors. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、有機発光表示装置に関し、より詳しくはタッチパネルを備えた有機発光表示装置に関するものである。   The present invention relates to an organic light emitting display device, and more particularly to an organic light emitting display device having a touch panel.

有機発光表示装置は、正孔注入電極、有機発光層および電子注入電極で構成される有機発光素子を含み、有機発光層内部で電子と正孔が結合して生成された励起子が、励起状態から基底状態に落ちる時に発生するエネルギーによって発光が起こる。   The organic light emitting display device includes an organic light emitting element including a hole injection electrode, an organic light emitting layer, and an electron injection electrode, and excitons generated by combining electrons and holes inside the organic light emitting layer are in an excited state. Luminescence occurs due to the energy generated when falling from the ground state to the ground state.

このような原理で有機発光表示装置は自発光特性を有し、液晶表示装置とは違って別途の光源を必要としないので、厚さと重量を減らせる。また、有機発光表示装置は、低い消費電力、高い輝度および高い反応速度などの高品位特性を現わすので、携帯用電子機器の次世代表示装置とされている。   Based on such a principle, the organic light emitting display device has a self-luminous property, and unlike a liquid crystal display device, an additional light source is not required, and thus the thickness and weight can be reduced. In addition, since the organic light emitting display device exhibits high quality characteristics such as low power consumption, high luminance, and high reaction speed, it is regarded as a next generation display device for portable electronic devices.

一般に、有機発光表示装置は、内部に有機発光素子を形成するパネルアセンブリーと、パネルアセンブリーの後方でパネルアセンブリーと結合するベゼルと、可撓性回路基板を通してパネルアセンブリーと電気的に連結される印刷回路基板とを含む。   In general, an organic light emitting display device is electrically connected to a panel assembly through a flexible circuit board, a panel assembly that forms an organic light emitting device therein, a bezel that is coupled to the panel assembly behind the panel assembly, and the panel assembly. Printed circuit board.

タッチスクリーンは、マウスやキーボードなどの入力方式を代替できる新たな入力方式であって、手やペンを利用してスクリーンに直接情報を入力できる新たな方式である。特に、タッチスクリーンは、使用者がスクリーンを見ながら所望の作業を直接遂行できて、誰でも簡単に操作できるので、ＧＵＩ（Ｇｒａｐｈｉｃａｌ Ｕｓｅｒ Ｉｎｔｅｒｆａｃｅ）環境下で最も理想的な入力方式として評価されている。現在、携帯電話機、ＰＤＡ、銀行や官公庁の端末器、各種医療装備、観光および主要機関の案内表示装置などの様々な分野で幅広く使用されている。   The touch screen is a new input method that can replace an input method such as a mouse or a keyboard, and is a new method in which information can be directly input to the screen using a hand or a pen. In particular, the touch screen allows a user to directly perform a desired work while looking at the screen and can be easily operated by anyone. Therefore, the touch screen is evaluated as the most ideal input method in a GUI (Graphical User Interface) environment. . Currently, it is widely used in various fields such as mobile phones, PDAs, terminals of banks and government offices, various medical equipment, tourism and guidance display devices of major institutions.

タッチスクリーンは大別して、抵抗膜方式、静電容量方式、超音波方式、光（赤外線）方式などに分類される。この中で抵抗膜方式は、透明導電膜がコーティングされている二枚の基板をドットスペーサを間において透明導電膜が対向するように固定させた構造からなる。   Touch screens are roughly classified into a resistive film method, a capacitance method, an ultrasonic method, and an optical (infrared) method. Among them, the resistance film method has a structure in which two substrates coated with a transparent conductive film are fixed so that the transparent conductive film faces each other with a dot spacer interposed therebetween.

抵抗膜方式の動作原理は、一側の透明導電膜に位置検出のための電気信号を印加し、使用者が指またはペン等で前面基板を押して、前面基板の透明導電膜が後面基板の透明導電膜と接触すれば、反対側の透明導電膜で電気的信号を検出する。この時、検出された電気的信号の大きさを利用して位置を検出するようになる。しかし、抵抗膜方式は作用する圧力によって信号が出力されるので、精密度が低いという問題点がある。また、使用者がタッチパネルを押す荷重が有機発光表示パネルにまっすぐ伝達されるので、有機発光表示パネルの不良を誘発することがある。   The operation principle of the resistive film method is that an electric signal for position detection is applied to the transparent conductive film on one side, the user presses the front substrate with a finger or a pen, and the transparent conductive film on the front substrate is transparent on the rear substrate. When in contact with the conductive film, an electrical signal is detected by the transparent conductive film on the opposite side. At this time, the position is detected using the magnitude of the detected electrical signal. However, the resistance film method has a problem that the precision is low because a signal is output by the acting pressure. In addition, since the load on which the user presses the touch panel is transmitted straight to the organic light emitting display panel, the organic light emitting display panel may be defective.

一方、光方式は、フォトセンサーを設置して、フォトセンサーが入射光の変化を捕らえて電気的信号を出力し、このような電気的信号に基づいて位置を検出する方式である。光方式は、圧力の適用なしに接触だけでも信号が出力されるので、優れた精密度を提供するが、有機発光素子から射出した光に影響を受けるので、誤作動を起こすという問題点がある。   On the other hand, the optical system is a system in which a photosensor is installed, the photosensor captures a change in incident light and outputs an electrical signal, and a position is detected based on such an electrical signal. The optical system provides excellent precision because a signal is output only by contact without the application of pressure, but it is affected by the light emitted from the organic light emitting device, and thus has the problem of causing malfunction. .

本発明は、上記問題点を解決するためのものであって、その目的は、有機ＬＥＤなどの発する内部光線（内光）と内部受光系の干渉を防止して、誤作動を防止できるフォトセンサーを利用したタッチスクリーンを備えた有機発光表示装置を提供することである。   The present invention is for solving the above-mentioned problems, and its object is to provide a photosensor capable of preventing malfunctions by preventing interference between an internal light beam (internal light) emitted from an organic LED or the like and an internal light receiving system. It is an object to provide an organic light emitting display device provided with a touch screen using the above.

本発明の実施形態による有機発光表示装置は、有機発光素子が形成された第１基板と、前記第１基板に結合される第２基板と、前記第２基板に形成されて外部ソースによって発生する入射光の変化を感知するフォトセンサーと、前記フォトセンサーを覆って前記有機発光素子から発光した光を前記フォトセンサーが感知できないように遮断する遮断層と、を含む。   An organic light emitting display device according to an embodiment of the present invention includes a first substrate on which an organic light emitting device is formed, a second substrate coupled to the first substrate, and an external source formed on the second substrate. A photo sensor that detects a change in incident light; and a blocking layer that covers the photo sensor and blocks light emitted from the organic light emitting device from being detected by the photo sensor.

前記遮断層は前記有機発光素子に向かう面に形成されることが好ましく、前記遮断層はブラックマトリックスからなることが好ましい。また、前記遮断層はＭＩＨＬ（Ｍｅｔａｌ Ｉｎｓｕｌａｔｏｒ Ｈｙｂｒｉｄ Ｌａｙｅｒ）、ブラックポリマー（ｂｌａｃｋ ｐｏｌｙｍｅｒ）、カーボンブラックからなる群より選択されるいずれか一つからなることが好ましい。   The blocking layer is preferably formed on a surface facing the organic light emitting device, and the blocking layer is preferably made of a black matrix. The blocking layer is preferably made of any one selected from the group consisting of MIHL (Metal Insulator Hybrid Layer), black polymer, and carbon black.

前記遮断層の間にはカラーフィルターが設けられることが好ましい。また、前記遮断層はマトリックス形態に配列されることが好ましく、前記有機発光素子もマトリックス形態に配置されることが好ましい。さらにまた、前記フォトセンサーは前記有機発光素子間に対応する位置に設置することが好ましい。   A color filter is preferably provided between the blocking layers. The blocking layer is preferably arranged in a matrix form, and the organic light emitting device is also preferably arranged in a matrix form. Furthermore, the photosensor is preferably installed at a position corresponding to the space between the organic light emitting elements.

前記フォトセンサーと前記第２基板との間にはタッチ電極が形成されることが好ましく、前記タッチ電極は透明な導電性素材からなることが好ましい。また、前記タッチ電極はＩＴＯ（Ｉｎｄｉｕｍ Ｔｉｎ Ｏｘｉｄｅ）、ＩＺＯ（Ｉｎｄｉｕｍ Ｚｉｎｃ Ｏｘｉｄｅ）、ＡＺＯ（Ａｌｕｍｉｎｕｍ-ｄｏｐｅｄ Ｚｉｎｃ Ｏｘｉｄｅ）、ＧＺＯ（Ｇａｌｌｉｕｍ-ｄｏｐｅｄ Ｚｉｎｃ Ｏｘｉｄｅ）、ＦＴＯ（Ｆｌｕｏｒｉｎｅ Ｔｉｎ Ｏｘｉｄｅ）、ＡＴＯ（Ａｎｔｉｍｏｎｙ-ｄｏｐｅｄ Ｔｉｎ Ｏｘｉｄｅ）からなる群より選択されるいずれか一つからなることが好ましい。   A touch electrode is preferably formed between the photosensor and the second substrate, and the touch electrode is preferably made of a transparent conductive material. In addition, the touch electrodes include ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), AZO (Aluminum-doped Zinc Oxide), GZO (Gallium-doped Zinc Oxide), and FTO (Fluorine Tin Oxide). It is preferably made of any one selected from the group consisting of (Tin Oxide).

本発明の他の実施例による有機発光表示装置は、 有機発光素子が形成された第１基板と、前記第１基板に結合される第２基板と、前記有機発光素子と前記第２基板との間に形成された遮断層と、前記遮断層によって覆われて、前記遮断層と前記第２基板との間に形成されたフォトセンサーと、を含むことが好ましい。   An organic light emitting display device according to another embodiment of the present invention includes a first substrate on which an organic light emitting device is formed, a second substrate coupled to the first substrate, the organic light emitting device and the second substrate. It is preferable to include a blocking layer formed therebetween, and a photosensor covered between the blocking layer and formed between the blocking layer and the second substrate.

前記遮断層はブラックマトリックスからなることが好ましく、前記フォトセンサーは前記有機発光素子に向かう面が前記遮断層で覆われることが好ましい。また、本発明の他の実施例による有機発光表示装置は、前記フォトセンサーと接触するように形成されたタッチ電極をさらに含むことが好ましい。   The blocking layer is preferably made of a black matrix, and the surface of the photosensor facing the organic light emitting device is preferably covered with the blocking layer. The organic light emitting display device according to another embodiment of the present invention may further include a touch electrode formed to be in contact with the photosensor.

本発明による有機発光表示装置は、フォトセンサーに遮断層を形成することによって内光の干渉を減少させ、敏感度の優れたタッチスクリーンを提供することができる。   The organic light emitting display device according to the present invention can reduce the interference of internal light by forming a blocking layer on the photosensor, and provide a touch screen with excellent sensitivity.

また、遮断層がブラックマトリックスからなって有機発光表示装置のコントラストが向上する。   In addition, since the blocking layer is made of a black matrix, the contrast of the organic light emitting display device is improved.

以下、添付した図面を参照して本発明の実施形態について本発明が属する技術分野における通常の知識を有する者が容易に実施できるように詳しく説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily carry out the embodiments.

図１は本発明の一実施形態による有機発光表示装置の断面図である。   FIG. 1 is a cross-sectional view of an organic light emitting display device according to an embodiment of the present invention.

図１を参考にすれば、本実施形態の有機発光表示装置は、第１基板２０と、第１基板２０の表示領域に備えられる有機発光素子Ｌ１と、シーリング部１６によって第１基板２０に結合される第２基板４０と、第２基板４０に形成されたフォトセンサー４３と、を含む。   Referring to FIG. 1, the organic light emitting display device of the present embodiment is coupled to the first substrate 20 by the first substrate 20, the organic light emitting device L <b> 1 provided in the display area of the first substrate 20, and the sealing unit 16. A second substrate 40 to be formed, and a photosensor 43 formed on the second substrate 40.

第１基板２０に形成された有機発光素子Ｌ１はマトリックス形態に配置される。有機発光素子Ｌ１が形成された領域の外側にはチップオンガラス（ｃｈｉｐ‐ｏｎ‐ｇｌａｓｓ;ＣＯＧ）方式で集積回路チップ２５が実装される。   The organic light emitting devices L1 formed on the first substrate 20 are arranged in a matrix form. An integrated circuit chip 25 is mounted outside the region where the organic light emitting element L1 is formed by a chip-on-glass (COG) method.

第２基板４０にはタッチ電極４２と、タッチ電極４２に連結されたフォトセンサー４３と、フォトセンサー４３を覆う遮断層４５とが形成される。前記タッチ電極４２、フォトセンサー４３および遮断層４５は、第２基板４０の内側、つまり第１基板２０に向かう第２基板４０の面に形成される。   A touch electrode 42, a photosensor 43 connected to the touch electrode 42, and a blocking layer 45 that covers the photosensor 43 are formed on the second substrate 40. The touch electrode 42, the photosensor 43, and the blocking layer 45 are formed on the inner side of the second substrate 40, that is, on the surface of the second substrate 40 facing the first substrate 20.

本実施形態では第２基板４０に遮断層４５とフォトセンサー４３が設置されているものと例示しているが、本発明がこれに制限されるものではなく、遮断層４５とフォトセンサー４３は前記第１基板２０の上に設置されることもできる。   In this embodiment, it is exemplified that the blocking layer 45 and the photo sensor 43 are provided on the second substrate 40, but the present invention is not limited to this, and the blocking layer 45 and the photo sensor 43 are the above-described ones. It can also be installed on the first substrate 20.

また、本実施形態では第１基板２０と第２基板４０が離隔しているものと例示しているが、本発明がこれに制限されるものではなく、第１基板２０と第２基板４０の間の空間には充填材（図示せず）が設置されることもできる。   In the present embodiment, the first substrate 20 and the second substrate 40 are illustrated as being separated from each other. However, the present invention is not limited to this, and the first substrate 20 and the second substrate 40 may be separated from each other. A filler (not shown) may be installed in the space.

タッチ電極４２は、透明な導電性材質のＩＴＯ（Ｉｎｄｕｉｍ Ｔｉｎ Ｏｘｉｄｅ）、ＩＺＯ（Ｉｎｄｕｉｍ Ｚｉｎｃ Ｏｘｉｄｅ）、ＡＺＯ（Ａｌｕｍｉｎｕｍ-ｄｏｐｅｄ Ｚｉｎｃ Ｏｘｉｄｅ）、ＧＺＯ（Ｇａｌｌｉｕｍ-ｄｏｐｅｄ Ｚｉｎｃ Ｏｘｉｄｅ）、ＦＴＯ（Ｆｌｕｏｒｉｎｅ Ｔｉｎ Ｏｘｉｄｅ）、ＡＴＯ（Ａｎｔｉｍｏｎｙｄｏｐｅｄ Ｔｉｎ Ｏｘｉｄｅ）からなる群より選択されるいずれか一つからなる。フォトセンサー４３は、外光の変化を感知して信号を発生させるセンサーであって、マトリックス形態に配置されるが、有機発光素子Ｌ１の間に位置して、有機発光素子Ｌ１から射出した光が干渉を受けることなく射出されるようにする。   The touch electrode 42 is made of a transparent conductive material such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), AZO (Aluminum-doped Zinc Oxide), GZO (Gallium-doped Zinc Oxide), FTO (Flu (Tx), FTO (Flu). It consists of any one selected from the group which consists of ATO (Anonymized Tin Oxide). The photosensor 43 is a sensor that detects a change in external light and generates a signal. The photosensor 43 is arranged in a matrix form, and is positioned between the organic light emitting elements L1 so that light emitted from the organic light emitting elements L1 is emitted. It should be emitted without interference.

図２に示されているように、遮断層４５は、フォトセンサー４３を覆うように設置される。有機発光素子Ｌ１から射出する内光がフォトセンサー４３に影響を与えないように、フォトセンサー４３から第１基板２０に向かう面とその周りを覆うように形成される。そのため、フォトセンサー４３が第２基板４０に向かう面は、遮断層４５によって覆われないため、第２基板４０の前方で起きる光の変化を捕らえることができる。   As shown in FIG. 2, the blocking layer 45 is installed so as to cover the photosensor 43. The inner light emitted from the organic light emitting element L <b> 1 is formed so as to cover the surface from the photo sensor 43 toward the first substrate 20 and its periphery so as not to affect the photo sensor 43. For this reason, the surface of the photosensor 43 facing the second substrate 40 is not covered by the blocking layer 45, so that a change in light that occurs in front of the second substrate 40 can be captured.

遮断層４５は、ブラックマトリックス（または黒色層）を兼用して形成することができる。ブラックマトリックスは光漏れ現象を防止して、コントラストを向上させる役割を果たして、ＭＩＨＬ（Ｍｅｔａｌ Ｉｎｓｕｌａｔｏｒ Ｈｙｂｒｉｄ Ｌａｙｅｒ）、ブラックポリマー（ｂｌａｃｋ ｐｏｌｙｍｅｒ）、カーボンブラック（ｃａｒｂｏｎ ｂｌａｃｋ）からなる群より選択されるいずれか一つからなる。ＭＩＨＬの絶縁膜は、ＳｉＯ２、ＳｉＮＸからなることができ、金属成分としては、Ｃｒ、Ａｌ、Ｍｏ、Ｗ、Ｔｉ、Ａｇ、Ｃｕおよびクロム酸化物などからなることができる。 The blocking layer 45 can be formed using both a black matrix (or a black layer). The black matrix functions to prevent light leakage and improve contrast, and is selected from the group consisting of MIHL (Metal Insulator Hybrid Layer), black polymer, and carbon black. It consists of one. The MIHL insulating film can be made of SiO 2 , SiN X , and the metal component can be made of Cr, Al, Mo, W, Ti, Ag, Cu, chromium oxide, or the like.

このように遮断層４５がブラックマトリックスのプロセスを用いて同時形成されると、別途の層を形成しなくてもブラックマトリックスを形成する過程で容易に遮断層を形成することができ、コントラストが向上する効果がある。   Thus, when the blocking layer 45 is simultaneously formed using the black matrix process, the blocking layer can be easily formed in the process of forming the black matrix without forming a separate layer, and the contrast is improved. There is an effect to.

第２基板４０でフォトセンサー４３が形成された領域の外側には、フォトセンサー４３を通じて入力された信号を分析して伝達する集積回路チップ４７が実装される。   An integrated circuit chip 47 that analyzes and transmits a signal input through the photosensor 43 is mounted outside the region where the photosensor 43 is formed on the second substrate 40.

図３は図１に示した有機発光表示装置の副画素回路構造を示す図であり、図４は図１に示した有機発光表示装置の内部を示す部分拡大断面図である。ここで、副画素とは単色の画素1単位を指し、カラー表示用の多色系２画素以上の組合せ画素１単位を主画素とする。   3 is a diagram showing a sub-pixel circuit structure of the organic light emitting display device shown in FIG. 1, and FIG. 4 is a partially enlarged sectional view showing the inside of the organic light emitting display device shown in FIG. Here, the sub-pixel means one unit of a single color pixel, and one unit of combined pixels of two or more multicolor systems for color display is a main pixel.

図３および図４を参考にすれば、有機発光表示装置の副画素は、有機発光素子Ｌ１と駆動回路部からなる。有機発光素子Ｌ１は、アノード電極２６、有機発光層２８、およびカソード電極３０を含み、駆動回路部は少なくとも２個の薄膜トランジスターＴ１、Ｔ２と一つの保存キャパシターＣ１を含む。薄膜トランジスターは、基本的にスイッチングトランジスターＴ１と駆動トランジスターＴ２を含む。   Referring to FIGS. 3 and 4, the sub-pixel of the organic light emitting display device includes an organic light emitting element L1 and a driving circuit unit. The organic light emitting device L1 includes an anode electrode 26, an organic light emitting layer 28, and a cathode electrode 30, and a driving circuit unit includes at least two thin film transistors T1 and T2 and one storage capacitor C1. The thin film transistor basically includes a switching transistor T1 and a driving transistor T2.

スイッチングトランジスターＴ１は、スキャンラインＳＬ１とデータラインＤＬ１に連結され、スキャンラインＳＬ１に入力されるスイッチング電圧によってデータラインＤＬ１に入力されるデータ電圧を駆動トランジスターＴ２に伝送する。保存キャパシターＣ１は、スイッチングトランジスターＴ１と電源ラインＶＤＤに連結され、スイッチングトランジスターＴ１から伝送された電圧と電源ラインＶＤＤに供給される電圧との差に相当する電圧を保存する。   The switching transistor T1 is connected to the scan line SL1 and the data line DL1, and transmits a data voltage input to the data line DL1 to the driving transistor T2 by a switching voltage input to the scan line SL1. The storage capacitor C1 is connected to the switching transistor T1 and the power supply line VDD, and stores a voltage corresponding to the difference between the voltage transmitted from the switching transistor T1 and the voltage supplied to the power supply line VDD.

駆動トランジスターＴ２は、電源ラインＶＤＤと保存キャパシターＣ１に連結されて、保存キャパシターＣ１に保存されたしきい電圧の差の自乗に比例する出力電流ＩＯＬＥＤを有機発光素子Ｌ１に供給し、有機発光素子Ｌ１は出力電流ＩＯＬＥＤによって発光する。駆動トランジスターＴ２は、ソース電極３２、ドレイン電極３４、およびゲート電極３６を含む。有機発光素子Ｌ１のアノード電極２６は駆動トランジスターＴ２のドレイン電極３４に連結できる。副画素の構成は、前述した例に限定されず、多様に変形できる。 Driving transistor T2 is coupled to the power supply line VDD and the storage capacitor C1, the output current I OLED that is proportional to the square of the difference between the stored threshold voltage storage capacitor C1 and supplied to the organic light emitting element L1, an organic light emitting element L1 emits light by the output current IOLED . The drive transistor T2 includes a source electrode 32, a drain electrode 34, and a gate electrode 36. The anode electrode 26 of the organic light emitting device L1 can be connected to the drain electrode 34 of the driving transistor T2. The configuration of the sub-pixel is not limited to the example described above, and can be variously modified.

前記副画素の近隣の第２基板４０の上にフォトセンサー４３が形成される。第２基板４０の上には複数のフォトセンサー４３がマトリックス形態に配置されるが、各々のフォトセンサー４３は遮断層４５で覆われる。遮断層４５は、副画素の間の空間に形成されるブラックマトリックスからなる。   A photosensor 43 is formed on the second substrate 40 in the vicinity of the subpixel. A plurality of photosensors 43 are arranged in a matrix on the second substrate 40, and each photosensor 43 is covered with a blocking layer 45. The blocking layer 45 is made of a black matrix formed in a space between subpixels.

このような遮断層４５は、光漏れ現象を防止してコントラストを向上させるだけでなく、フォトセンサー４３が内光に影響を受けることを防止して、安定的にタッチパネル機能を実現することができる。外部から指またはペンなどのものが寄りつけば、フォトセンサー４３はその接近を感知して信号を発生させ、当該地点が有する命令を遂行するようになる。   Such a blocking layer 45 not only improves the contrast by preventing the light leakage phenomenon, but also prevents the photosensor 43 from being affected by the internal light, thereby realizing a stable touch panel function. . When a finger or pen or the like approaches from the outside, the photo sensor 43 detects the approach and generates a signal to execute the command of the point.

図５は本発明の第２実施形態による有機発光表示装置を示す断面図である。図５を参照して説明すれば、本実施形態による有機発光表示装置は、遮断層４５の間にカラーフィルター層４８を形成する。カラーフィルター層４８は、副画素領域に赤色（Ｒ）、緑色（Ｇ）、青色（Ｂ）を示すカラーフィルターが所定の順で配列された状態である。このように、遮断層４５の間にカラーフィルター層４８が形成されることによって空間活用効率を向上させることができ、より安定的に画像を表示することができる。   FIG. 5 is a cross-sectional view illustrating an organic light emitting display device according to a second embodiment of the present invention. Referring to FIG. 5, the OLED display according to the present embodiment forms the color filter layer 48 between the blocking layers 45. The color filter layer 48 is a state in which color filters indicating red (R), green (G), and blue (B) are arranged in a predetermined order in the sub-pixel region. As described above, by forming the color filter layer 48 between the blocking layers 45, the space utilization efficiency can be improved, and an image can be displayed more stably.

以上、本発明の好ましい実施形態について説明したが、本発明はこれに限定されるものではなく、特許請求の範囲と発明の詳細な説明および添付した図面の範囲内で多様に変形して実施でき、これもまた本発明の範囲に属するのは当然である。   The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various modifications can be made within the scope of the claims, the detailed description of the invention and the attached drawings. Of course, this also belongs to the scope of the present invention.

本発明の第１実施形態による有機発光表示装置の断面図である。1 is a cross-sectional view of an OLED display according to a first exemplary embodiment of the present invention. 図１に示した第１基板とこれに設けられた部材を示す斜視図である。It is a perspective view which shows the 1st board | substrate shown in FIG. 1, and the member provided in this. 図１に示した有機発光表示装置の副画素回路を示す図である。FIG. 2 is a diagram illustrating a sub-pixel circuit of the organic light emitting display device illustrated in FIG. 1. 図１に示した有機発光表示装置の内部を示す部分拡大断面図である。FIG. 2 is a partial enlarged cross-sectional view showing the inside of the organic light emitting display device shown in FIG. 1. 本発明の第２実施形態による有機発光表示装置の断面図である。FIG. 5 is a cross-sectional view of an organic light emitting display device according to a second embodiment of the present invention.

符号の説明Explanation of symbols

２０ 第１基板、
４０ 第２基板、
４３ フォトセンサー、
４５ 遮断層、
４８ カラーフィルター層。 20 first substrate,
40 second substrate,
43 Photosensor,
45 barrier layer,
48 Color filter layer.

Claims (15)

有機発光素子が形成された第１基板と、
前記第１基板に結合される第２基板と、
前記第２基板に形成されて外部ソースによって発生する入射光の変化を感知するフォトセンサーと、
前記フォトセンサーを覆って前記有機発光素子から発光した光を前記フォトセンサーが感知できないように遮断する遮断層と、を含むことを特徴とする有機発光表示装置。 A first substrate on which an organic light emitting element is formed;
A second substrate coupled to the first substrate;
A photo sensor formed on the second substrate for sensing a change in incident light generated by an external source;
An organic light emitting display device comprising: a blocking layer that covers the photosensor and blocks light emitted from the organic light emitting element from being detected by the photosensor. 前記遮断層は前記有機発光素子に向かう面に形成されたことを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein the blocking layer is formed on a surface facing the organic light emitting device. 前記遮断層はブラックマトリックスからなることを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein the blocking layer comprises a black matrix. 前記遮断層はＭＩＨＬ（Ｍｅｔａｌ Ｉｎｓｕｌａｔｏｒ Ｈｙｂｒｉｄ Ｌａｙｅｒ）、ブラックポリマー、カーボンブラックからなる群より選択されるいずれか一つからなることを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein the blocking layer is made of any one selected from the group consisting of MIHL (Metal Insulator Hybrid Layer), black polymer, and carbon black. 前記遮断層の間にはカラーフィルターが設けられたことを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein a color filter is provided between the blocking layers. 前記遮断層はマトリックス形態に配列されることを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein the blocking layers are arranged in a matrix form. 前記有機発光素子はマトリックス形態に配置されることを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein the organic light emitting devices are arranged in a matrix form. 前記フォトセンサーは前記有機発光素子間に対応する位置に設置することを特徴とする請求項７に記載の有機発光表示装置。   The organic light emitting display device according to claim 7, wherein the photosensor is installed at a position corresponding to the space between the organic light emitting elements. 前記フォトセンサーと前記第２基板との間にはタッチ電極が形成されたことを特徴とする請求項１に記載の有機発光表示装置。   The organic light emitting display device according to claim 1, wherein a touch electrode is formed between the photosensor and the second substrate. 前記タッチ電極は透明な導電性素材からなることを特徴とする請求項９に記載の有機発光表示装置。   The organic light emitting display device according to claim 9, wherein the touch electrode is made of a transparent conductive material. 前記タッチ電極はＩＴＯ（Ｉｎｄｉｕｍ Ｔｉｎ Ｏｘｉｄｅ）、ＩＺＯ（Ｉｎｄｉｕｍ Ｚｉｎｃ Ｏｘｉｄｅ）、ＡＺＯ（Ａｌｕｍｉｎｕｍ-ｄｏｐｅｄ Ｚｉｎｃ Ｏｘｉｄｅ）、ＧＺＯ（Ｇａｌｌｉｕｍ-ｄｏｐｅｄ Ｚｉｎｃ Ｏｘｉｄｅ）、ＦＴＯ（Ｆｌｕｏｒｉｎｅ Ｔｉｎ Ｏｘｉｄｅ）、ＡＴＯ（Ａｎｔｉｍｏｎｙ-ｄｏｐｅｄ Ｔｉｎ Ｏｘｉｄｅ）からなる群より選択されるいずれか一つからなることを特徴とする請求項１０に記載の有機発光表示装置。   The touch electrodes may be ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), AZO (Aluminum-doped Zinc Oxide), GZO (Gallium-doped Zinc Oxide), FTO (Fluorine Tin Oxide Oxide). The organic light-emitting display device according to claim 10, wherein the organic light-emitting display device is any one selected from the group consisting of: 有機発光素子が形成された第１基板と、
前記第１基板に結合される第２基板と、
前記有機発光素子と前記第２基板との間に形成された遮断層と、
前記遮断層によって覆われて、前記遮断層と前記第２基板との間に形成されたフォトセンサーと、を含むことを特徴とする有機発光表示装置。 A first substrate on which an organic light emitting element is formed;
A second substrate coupled to the first substrate;
A blocking layer formed between the organic light emitting device and the second substrate;
An organic light emitting display device comprising: a photosensor covered with the blocking layer and formed between the blocking layer and the second substrate. 前記遮断層はブラックマトリックスからなることを特徴とする請求項１２に記載の有機発光表示装置   The organic light emitting display device according to claim 12, wherein the blocking layer comprises a black matrix. 前記フォトセンサーは前記有機発光素子に向かう面が前記遮断層で覆われたことを特徴とする請求項１２に記載の有機発光表示装置。   The organic light emitting display device according to claim 12, wherein a surface of the photosensor facing the organic light emitting element is covered with the blocking layer. 前記フォトセンサーと接触するように形成されたタッチ電極をさらに含むことを特徴とする請求項１２に記載の有機発光表示装置。   The organic light emitting display device of claim 12, further comprising a touch electrode formed to be in contact with the photosensor.
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JP4940226B2 (en) 2012-05-30
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